Lichen, 2010 ammonia avoidance (history)

The AIW (acidophilic Indication Value) is a measure of ammonia load and is based on the prevention of lichens sensitive to ammonia. High values indicate where the environment is still relatively little affected. The AIW (acidophilic Indication Value) is a measure of ammonia load and is based on the prevention of lichens sensitive to ammonia. High values indicate where the environment is still relatively little affected.AIW（嗜酸性指示值，acidophilic Indication Value）是一种衡量氨负荷的指标，其构建基于对氨敏感的地衣的防护准则。该指标数值越高，代表对应环境受影响程度相对越低。